BRIDGING THE FREQUENCY GAP FOR VIBRO-ACOUSTIC PREDICTION OF A SUBMERGED SHELL
Résumé
Modelling the vibro-acoustic behaviour of an underwater vehicle is important to predict the impact on the marine environment, to ensure that the noise and vibration levels do not pose discomfort for crew, and to assist in identifying mitigation strategies to reduce underwater radiated noise. The motivation of this paper is to examine the vibro-acoustic responses of a simplified physical model of an underwater vehicle corresponding to a finite cylindrical shell submerged in a heavy fluid of infinite extent, representing a classic fluid-structure interaction problem. The cylindrical shell is excited by a point force in the radial direction. The structural and acoustic responses of the submerged hull in the low to medium frequencies are predicted using a range of techniques to cover and bridge the frequency ranges. The advantages and limitations of each technique are discussed.
Domaines
Acoustique [physics.class-ph]
Origine : Fichiers produits par l'(les) auteur(s)
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